Replace macro ASM_ASSERTION with macro ENABLE_ASSERTIONS

This patch replaces the macro ASM_ASSERTION with the macro
ENABLE_ASSERTIONS in ARM Cortex-A53/57/72 MPCore Processor
related files. There is build error when ASM_ASSERTION is set
to 1 and ENABLE_ASSERTIONS is set to 0 because function
asm_assert in common/aarch32/debug.S is defined in the macro
ENABLE_ASSERTIONS but is called with the macro ASM_ASSERTION.

There is also the indication to use ENABLE_ASSERTIONS but not
ASM_ASSERTION in the Makefile.
Signed-off-by: Matt Ma <matt.ma@spreadtrum.com>

lib/cpus/aarch32/cortex_a53.S

@@ -174,7 +174,7 @@ func cortex_a53_core_pwr_dwn
 	push	{r12, lr}
 
 	/* Assert if cache is enabled */
-#if ASM_ASSERTION
+#if ENABLE_ASSERTIONS
 	ldcopr	r0, SCTLR
 	tst	r0, #SCTLR_C_BIT
 	ASM_ASSERT(eq)
@@ -204,7 +204,7 @@ func cortex_a53_cluster_pwr_dwn
 	push	{r12, lr}
 
 	/* Assert if cache is enabled */
-#if ASM_ASSERTION
+#if ENABLE_ASSERTIONS
 	ldcopr	r0, SCTLR
 	tst	r0, #SCTLR_C_BIT
 	ASM_ASSERT(eq)

lib/cpus/aarch32/cortex_a57.S

@@ -406,7 +406,7 @@ func cortex_a57_core_pwr_dwn
 	push	{r12, lr}
 
 	/* Assert if cache is enabled */
-#if ASM_ASSERTION
+#if ENABLE_ASSERTIONS
 	ldcopr	r0, SCTLR
 	tst	r0, #SCTLR_C_BIT
 	ASM_ASSERT(eq)
@@ -448,7 +448,7 @@ func cortex_a57_cluster_pwr_dwn
 	push	{r12, lr}
 
 	/* Assert if cache is enabled */
-#if ASM_ASSERTION
+#if ENABLE_ASSERTIONS
 	ldcopr	r0, SCTLR
 	tst	r0, #SCTLR_C_BIT
 	ASM_ASSERT(eq)

lib/cpus/aarch32/cortex_a72.S

@@ -120,7 +120,7 @@ func cortex_a72_core_pwr_dwn
 	push	{r12, lr}
 
 	/* Assert if cache is enabled */
-#if ASM_ASSERTION
+#if ENABLE_ASSERTIONS
 	ldcopr	r0, SCTLR
 	tst	r0, #SCTLR_C_BIT
 	ASM_ASSERT(eq)
@@ -167,7 +167,7 @@ func cortex_a72_cluster_pwr_dwn
 	push	{r12, lr}
 
 	/* Assert if cache is enabled */
-#if ASM_ASSERTION
+#if ENABLE_ASSERTIONS
 	ldcopr	r0, SCTLR
 	tst	r0, #SCTLR_C_BIT
 	ASM_ASSERT(eq)

make_helpers/defaults.mk

@@ -24,9 +24,6 @@ ARM_ARCH_MINOR			:= 0
 # in EL3. The platform port can change this value if needed.
 ARM_GIC_ARCH			:= 2
 
-# Flag used to indicate if ASM_ASSERTION should be enabled for the build.
-ASM_ASSERTION			:= 0
-
 # Base commit to perform code check on
 BASE_COMMIT			:= origin/master